Clearing-sign hammer mechanism



Dec, 30. 1924. 1,521,477

. F. RAUCHWETTER CLEARING SIGN HAMMER MEGHANISM Filed Deb. 14, 1922 2 sheetsheet 1 VDec. 30. 1924. 1,521,477

F. RAUCHWETTER CLEARING SIGN HAMMER MECHANISM Filed D; 14 1922 2 sheets-.sheet l.2

" /n vento/1:

Patented ec. 3G, 1924.

FRANZ RAUCHTVETTER, DECEASED, LATE BER-LIN E ALFRE? FLATEB, .er,DvIYTSfiltfla'i.y

REEEENAU, GERMANY; BY .'MJRLN, GERMANY.

Application lecf. December le, 1922. Serial No. 696,885.

To @ZZ 107mm t may concern.'

Be it known that FRANZ Raconwn'r'rnu, late a citizen of the German Republic, and a resident ot Berlin-Friedenau, Germany, has invented certain new and usetul lmprovements in and Relating to Clearing Sign Hammer Mechanisms, of which the `following is a specilication.

ln case ot' calculating machines having a printing mechanism it is necessary to separate the various calculations following each other. For this purpose a so-called clearing-sign"1 is used printed with the .first item of a new calculation and when being printed indicates that the preceding calculation is completely linished, in other words, that the machine is clear and ready for a new calculation. As a complete calculation linishes with a total sum which is printed, it has also already been proposed to so set the hammer which, when beginning a new calculation, is supposed to strike against the adjusted type rod of the clearing sign, that its actuating mechanism is set in advance when printing the total sum of the preceding calculation and is released when printing the first item of a new calculation. To this class of hammer mechanisms for the printing of the clearing sign also belongs the invention which forms the subject matter ot this application.

The object of the present invention is to provide improved means whereby the releasing mechanism of the clearing sign hammer may be put into or out of operation automatically as may be required during the operation of the calculating machine.

In the accompanying drawings .which show an embodiment of my invention.

Figure 1 is a side elevation ot the hammer actuating mechanism tor the clearing sign inA a positioncorresponding to the printing of the iirst item of a new calculation. Y

Figure la is a similar view of the same in a position corresponding to the commencement of the total printing.

Figure 2 is a side elevation of the same in a position corresponding to the printing of the currentA item or to the intermediate printing.

Figure V2a is a perspective view ot the same, in the same position, and in connection with the moving devices tor the counting mechanism.

Figure 3 is a ilront elevation ot' the same.

Figure 4l is a detailed perspective of the lever 124 forming a part ot the mechanism 'lor actuating the coupling lever.

As such may be seen 'from the drawing, 1 the type rod tor the sign with the clearing sign type 53 which by means of the lever 2 is set by the keys. After thc setting has been. ei'ected, the clearing sign 3 is within the path cit the clearing sign hammer 51. ln this position the pin 51 ot the type rod 1 holds down a lever 85 below the swinging path oit a lever 59 tinted to arms 58 which are mounted ou the swinging shaft 55. It the lever S5 were lifted so that its notch 90 is in the path oit the lever 59, upon a swinging et the lever 59 to the lett, the lever 85 would be forced to follow the movement and thereby the catch lever 54: of the hammer 51 swingng about the pin 54k is disengaged from said hammer so that the latter is released and can be made to strike by the action et its spring 53. For the type rods ot the numerals following the type rods 1 `for the clearing marlrs to the left and corresponding to the separate number columns of the calculating machine a plurality or" such hammer actuating mechanisms for the signs are arranged side by side which upon the setting ot a number in the above described manner are moved by the lever 59 as is usual in machines oif this class, only one such mechanism being here shown in the drawings. These hammer actuating mechanisms ter the numbers with the disengaging levers S5 must now in case or calculating machines be consecutively coupled to each other so that the mechanisms following a set of mechanisms to the right are continuously released for the printing ot the zeros. This can be effected by means of special auX- iliary levers mounted on the disengaging levers 85 'for the hammers for the numerals which are in the path ot stop or pins on the discngaging levers 85 following on the lett. rlhe hammer mechanisms for the type rod 1. ter the sign however must not be forced to `follow the movement of the rod following the mechanism for the unit place hammer on the left, as in such a case, upon a consecutive printing of the items or inter mediary sums, the'clearing sign would also be printed. In accordance with this invention means are provided to prevent the clearing sign from being printed until a complete calculation is linished, and immediately prior tothe print'ng of the lirst item of a new calculation. This is achie fed by means of a special coupling lever 117 hinged to thelever 85 of the hammer mechanism for the sign, which swings about a journal 86 of the lever 85 and in a certain position is moved by a. 'pin 84, of the lever 85 of the hammer mechanism for the unit places following on the left. This position in which the coupling lever 117 is forced to follow the movement of the pin 84 of the lever 85 of the hammer mechanism for the unit on the left and thus also cai'ries along the disengaging lever of the hammer mechanism for the s'gn on which it is mounted, isrshown in Fig. 1., or `in Fig. 1*l in dotted lines respectively, while in 2 and Fig. 2 .(or in Fig. 1 in full lines) those positions of the coupllng lever 117 are shown in which it is not affected by the pin 81 of the lever 85 of the hammer mechanism for the unit places following on the left so that therefore in this position a disengaging of thehan'imer mechanism for the sign does not take place, a position,corresponding to the current printing of the items and intermediary sums.

For moving the coupling lever 117 from the end position Fig. 1 for the clearing sign printing into the end-position Fig. 2 for the current printing of items or intermediary sums, the clearing mark hammer 51 swinging about the journal 52 has been provided with a projection which upon a shooting forward of the clearing sign hammer 51 into the printing position strikes against the extension 118 of the coupling lever 117 thereby forcing it back into the position shewn in Fig.2 and Fig. 2a. The coupling lever 117 is in this case held by friction to the journal of the disengaging lever 85 so that it remains in the position into which it has been brought lin every case (position Fig. 1 or Fig. 2). The right end of the coupling lever 117 is provided at one end at the lower side with a flange 121 and at the upper side with a flange 120 which are spaced apart a distance greater than vthe width of the lever 85 and extend into the path of movement of said lever and are arranged respectively below and above the same. The edge 122 of the flange 12() is set back to a ,slight extent with regard to the edge of the flange 121 so that in the position of the coupling lever 117 shewn in Fig. 27 the pin 84 of the hammer mechanism for the unit places following on the left when moving does not strike against the back edge 122 and in consequence Aalso cannot actuate lthe coupling lever 117 and disengaging -lever 85 of the hammer mechanism for the sign which must not take place with a'current printing fof items and intermediary sums. If however the coupling lever 117 assumes theposition shewn in Fig. 1, the edge of the limiting flange 121 enters the path of the pin 84 of the hammer mechanism for the unit places following on the left, so that now upon a moving of the hammer mechanism for the unit places the pin 8l thereof forces the coupling lever 117 and thus also the disengaging lever 85 of the liannner mechanism for the clearing sign to follow its movement and consequently the hammer mechanism for the clearing sign is disengaged. The advance adjustment of the coupling lever 117 for the hammer mechanism of the clearing sign into the position shewn in Fig. 1 is effected in every instance upon the moving of the counting mechanism for the printing of the total sums, while however upon the moving of the counting mechanism corresponding to the current printing of items or intern'iediary sums the coupling lever 117 is not actuated, but remains in the position shown in Figs. 2 and 2". This is achieved by means of a special mechanism the movement of which depends on the one hand upon the movement of the counting mechanism that is lo say, the raising and lowering of the counting mechanism, and on the other hand upon the uniform movements of the machine crank.

This mechanism consists of a lever 124 rotatable on a fixed axle 123, the lever being shown in perspective in Fig. 41. By means of a spring 125 the lower arm of this lever provided with a curve 126 is constantly drawn to the left in such a manner that the ciirve 126 is in the moving path of a pin 127 of a vertically movable swlnging rod y75. If .the pin 127 upon its downward movement strikes the curve 126, the lever 124 is turned about the axle 123 in such a manner that its lower arm swings to the right and its upper arm to the left. Thus it produces a swinging according to the time of the movement of the rod which in consequence of the bell cranklever 116 swinging about the journal 77 by means of theswinging rod from the machine crank or inachine shaft is raised and lowered with every actuation of the machine crank (compare in particular Figs. la'and 2a).

To the upper end of the lever 124 apin 128 is fastened which projects into a slot 129 of a guide 130. This guide 130 is hinged at its lower end, as at 131L to a double lever 132 swinging about a fixed axle 131. The double lever 132 is arranged to be swung out by a crank 133 mounted on a shaft 133 rotated by the lifting disc for the counting mechanism. For this purpose on the shaft 133 a crank 133 is mounted hinged to the rod 10 of the counting mechanism supported on the lifting disc so that the crank 133 is swung out according to ther raising and lowering of the rod 10 ofthe counting mechanism and consequently also according' to the moving of the liftingdisc 4 for the counting mechanism. The moving of the lifting disc 4t for the counting mechanism is eected by means oi swinging rods 8 and 9 which are provided with angular slots G and 7 through which passes a pin 5, said rods being actuated trom the machine crank in various phases according to whether counting mechanism tor the consecutive printing of the items, of the intermediatesums or ot' the total sums must be raised or lowered. The rails 22 and 22 and levers 21 and 21 serve for the corresponding adjustment of the push rods 8 and 8 for the printing of the intermediate sums or ot the total sums respectively by the rod being connected to the key corresponding to the fixed ligure of the intermediate sum and the rod 22 to the key corresponding to the fixed ligure of the total. sum. The result ot this is that the double lever 132 swings up and down according to the stroke ot the counting mechanism and imparts an up and down movement tothe guide 130 which by means ot the pin 128 engages with the slot 129 of the lever 124 so that with every upmovement of the counting mechanism the guide is pushed upwards.

Figs. 1 and 1a correspond to the lowered position of the counting mechanism, Figs. 2 and 2a to the raised position thereof. Un the upper end of the guide 130 the element turns freely on the pin 134. Said element 135 has lianges 136 and 137 arranged respectively on opposite sides of the `guide 130 to permit restricted free movement of the element 135. By gravity the flange 13G of element 135 bears against the guide 130 in which case its pushing ledge 138 is in the same plane as the liange 121 of the coupling lever 117. The: guide 130 has a slot 139 through which the axle 123 passes, said slot being so arranged as to enable the guide 130 to carry out all necessary movements. These movements of the guide 130 and thus that ot the pushing edge 138 are composed of two movements as may be gathered from the aforegoing. The first movement is a swinging movement of the guide 130 about the pivot 132 of the lever 132. This is produced by the lever 124 turned by the pin 127 about the shaft 123 by means ot the pin 128 engaging with the slot 129 of the guide 130 swinging the latter about the pivot 132. This swinging takes place with every actuation of the machine crank or of the shaft of the main machine and with the aid oi" it the pushing edge 138 is every time brought into the path of the 'flange 121 of the coupling lever 117. The second movement ot the guide 130` consists of a raising and lowering corresponding to the raising and lowering of the counting mechanism. This is effected by swinging out the double lever 132 about the pin 131 by means oi the arm 133 whereby the guide 130 hinged to the double lever by means ci the pin 132 is raised and lowered.

.ln case oit a current printing oit the items or intermediate sums the raising oit the counting mechanism is cll'ccted in such a manner that only towards the end of the return movement ot the machine crank is the counting mechanism lifted from the toothed wheel gearing o1' the adjusting mechanism; consequently in. case of a current printing of the items and intermediate sums the raising ot the guide 130 does not take place until. at thc end of the return movement oi" the machine crank, that is to say in a position in which the pushing rod 75 together with its pin 117 has been again raised (Figs. 2 and 2n). Hence the lower arm ot the lever 124e can swing out again to the left under the action or" the spring 125 and thereby swing the guide 130 with the pushing edge 138 ot its top piece 135 out of the path of the slop flange 121 so that upon a raising oli the guido 130 corresponding` to the raising oiv the count-ing mechanism in case of a current irintinO of items and intermediate sums the pushing edge 138 does not actuate the coun pling lever 117.

lhen printing tota-l sums however the rising of the counting mechanism as is well known `takes place at the commencement ot the return movement ot' the crank, that is to say at an instant, in which the pushing rod and the element 117 thereoft controlled by the machine crank are still in a. lowered position, that is to say in the position corresponding to that of Fig. 1. It at this moment the guide 130 is raised by the double lever 132, the striking edge 138 of its top piece 135 is beneath the stop flange 121 of the coupling lever 117, and hence when being raised will strike against flange 121 and thereby bring the coupling lever 117 into the position shown in Fig. 1, in cousequence ot which upon the next following .tirst printing ot item oft a new calculation it is forced to follow the movement of pin 84 oi the hammer mechanism for the unit places so that in this case the releasing of the hammer gearing for the sign takes place. The top piece 135 mounted on the guide 130 serves the object to enable the downward movement of the guide 130 during the current printing of items or intermediate sums. that is t-o say in the position of the coupling lever 117 corresponding to Fig. 2. During this downward movement the top piece strikes against the flange 121 and can then turn to the side about the pin 134e, whereupon after the passing of the tlange it returns to its initial position either by its own weight or by the action o'tl the spring. The device acts in the following manner: The raising of t-he counting mechanism and the pushing upward of the pushing edge 138 combined therewith occurs simultaneously with the printing of the items and ot the intermediate sums during the last quarter of the return movement of the hand lever. At this period the pin 127 owing to the machine crank controlling it is already at such a height (at the return movelnent ol1 the crank the pushing rod 75 lifts itself up) that the pushing edge 1558 is no longer underneath the tiange 121. Hence the hammer for the mark is not released when the next item printed, Alfter the printing of the total sums however the counting mechanisln is raised already during the lirst quarter of the return movement of the crank. At this period, however, the pin 127 is still in such a low position that the pushing edge 138 is still in the etlfective position and upon its upward movement forces the flange 121 to follow its movement, thereby bringing the raised part of the edge 122 into the path of the pin 84 at the unit place ot' the hammer mechanism. Upon the printing of the next item the pin 81 is swung' out to the left and thereby disengages the locking device tor the hammer of the sign whereby the printing ot' the clearing sign isy effected. The returning oit the lever 117 into its ineffective position takes place at the .instant when the hammer of the sign 51 shoots forward by the extension 119 ot' the hammer pressing the end 118 ol the lever 117 to the right.

I claim as my invention:

In clearing sign hammer mechanism for calculating machines the combination of a hammer, a hammer actuating device for the clearing sign, releasing mechanism for said hammer comprising Va lever mounted for sliding and pivotal movement and provided with a notch, a lever revoluble with an element ot the hammer actuating mechanism and cngageable in said notch, a catch lever mounted for pivotal movement engageable with the hammer and connected to said first named lever, springs to actuate said hammer, catch lever and lirst named lever, a coupling lever pivotally mounted on the Vfirst named lever and arranged for limited pivotal movement, and having a projection, said hammer having an extension arranged in the path of said projection, an oscillatory mechanism arranged for operation with the calculating machine crank and with the counter mechanism thereof and including a lever oscillatable about a fixed axis, a guide link arranged for limited movement with respect to said fixed axis, and an element pivotally mounted on said guide link arrranged for limited pivotal movemei'it with respect thereto and connected to said lever tor movement by the latter into and out of engagement with said coupling lever.

In testimony whereof I have signed Illy name to this specification in the yI'nesen'ce of two subscribing witnesses.

ALFRED FLATER, Administrator 0f Franz Rauchwetter, de-

ceased.

lVitnesses:

E. HoLzEnMAN, Roeien T. ANsPAoH. 

